Did solving the last problem involve: changing the design of the torpedo? changing the launch procedures? The detonation parameters? The enemy=the Japanese? German? Just axis powers in general? Was the problem here that it did not always explode? Was the torpedo defective in a third way? Did the enemy build ships that were vulnerable even to a defective torpedo?

Did solving the last problem involve: changing the design of the torpedo? Thisish. changing the launch procedures? The detonation parameters? The enemy=the Japanese? This. German? Just axis powers in general? Was the problem here that it did not always explode? Yes. Was the torpedo defective in a third way? Yes. Did the enemy build ships that were vulnerable even to a defective torpedo? No.

It failed to explode even after detecting the ships, correct? Did it fail to explode when the contact fuze was triggered? Was there something wrong with the explosive itself? With the detonator? The fuze mechanism? Did the torpedoes use electrical detonators only? Did water get into sensitive parts of the mechanism? Or other foreign matter? Rust relevant? Galvanic corrosion? Other corrosion?

It failed to explode even after detecting the ships, correct? It could't detect them -- this wasn't a homing torpedo. Did it fail to explode when the contact fuze was triggered? Yes. Was there something wrong with the explosive itself? No. With the detonator? Yes. The fuze mechanism? You could say so. Did the torpedoes use electrical detonators only? Yes. Did water get into sensitive parts of the mechanism? Or other foreign matter? Rust relevant? Galvanic corrosion? Other corrosion? None of these.

Did the detonator not detonate? Or detonate too weakly? Did it not get enough electricity to detonate? Did it need more electricity than the specification indicated? Was there something wrong with the power supply? Was there something wrong with the explosive in the detonator? Was it missing? Or was the detonator not sufficiently embedded in the secondary explosive? Relevant what type of electric detonator it was?

Did the detonator not detonate? This. Or detonate too weakly? No. Did it not get enough electricity to detonate? Correct. Did it need more electricity than the specification indicated? No. Was there something wrong with the power supply? No. Was there something wrong with the explosive in the detonator? No. Was it missing? No. Or was the detonator not sufficiently embedded in the secondary explosive? No. Relevant what type of electric detonator it was? I don't think so; there is a relevant part of the detonator that does not necessarily have to be electric, but is in this case.

Did a switch not close properly? Or a relay? Did the impact sensor not always activate on impact? Did the sensor itself not always come in contact the target? Because of how the casing/trigger was shaped? Or did it jam? Did it malfunction when hitting the target at a shallow angle? Or head on?

Did a switch not close properly? This, I think. Or a relay? Did the impact sensor not always activate on impact? Yesish. Did the sensor itself not always come in contact the target? No. Because of how the casing/trigger was shaped? No. Or did it jam? This. Did it malfunction when hitting the target at a shallow angle? Or head on? This - as a hint it worked better when striking at shallow angles.

So did something that the enemy did/had alert them to the problem? No, other than their ships not sinking.Did the enemy become aware of the defective torpedo problem? Yes, but irrelevant to the solution.

Did they use parts from enemy equipment in the torpedoes that were fixed? Or did they only use the equipment to make the necessary change to the firing mechanism? Did they copy the equipment? Is it a tool? Was it designed for use on torpedoes? Or something completely different?

Did they use parts from enemy equipment in the torpedoes that were fixed? This. Or did they only use the equipment to make the necessary change to the firing mechanism? Did they copy the equipment? No. Is it a tool? No. Was it designed for use on torpedoes? No. Or something completely different? Yes.

Did they replace the firing pin? Did the enemy equipment just happen to fit correctly? Did they replace anything? Or only add this part to fix the problem? Is the part made from: metal? Rubber? Wood? Plastic? Glass? Fabric? Leather? Paper? Liquid? Plant? Animal? Was it: captured? Left on battlefields? Thrown/dropped/fired/otherwise delivered to the allied forces? Was it found on land? On enemy ships? Or airplanes?

Did they replace the firing pin? Yes. Did the enemy equipment just happen to fit correctly? No. Did they replace anything? Yes. Or only add this part to fix the problem? No. Is the part made from: metal? This. Rubber? Wood? Plastic? Glass? Fabric? Leather? Paper? Liquid? Plant? Animal? Was it: captured? Thisish. Left on battlefields? But this is more correct. Thrown/dropped/fired/otherwise delivered to the allied forces? Was it found on land? On enemy ships? Or airplanes? Yes.

Was it cylindrical? Did they modify it to fit? And then it fit better than the original firing pin? Did they capture/find enough parts that they didn't need to manufacture their own? How many of the part would be found in an airplane, more than: 2? 5? 10? 50? 200? Was it originally an axle of some sort? Would it help to know approx. how big it was?

Was it cylindrical? Not originally. Did they modify it to fit? Yes. And then it fit better than the original firing pin? Not this. Did they capture/find enough parts that they didn't need to manufacture their own? For the time being; I think they eventually started manufacturing an improved firing pin at the factory. How many of the part would be found in an airplane, more than: 2? 5? 10? 50? 200? I don't know exactly, but scores at least. Was it originally an axle of some sort? No. Would it help to know approx. how big it was? Dunno exactly, but typically around 6 feet across in undamaged condition, depending on the plane it came from.

Were they struts? Tubular? Square? Flat? Structural elements? None of these, though there are elements of flatness. Did they work better because it fit worse than the original firing pin? No. So that it could move more freely?

Did they use it: because they could? Because it could easily be machined to fit? Because some part of it was perfect for the job? Did they use one propeller blade in each torpedo? Or an entire propeller? Or did they make several firing pins out of one propeller? Is the metal used in propellers relevant? Was it alu? Steel? Titanium?

Did they use it: because they could? It {was handy.} Because it could easily be machined to fit? Because some part of it was perfect for the job? This. Did they use one propeller blade in each torpedo? Or an entire propeller? Or did they make several firing pins out of one propeller? Yes. Is the metal used in propellers relevant? Yes. Was it alu? This. Steel? Titanium?

Did the aluminum in the blades make a better material for the pins than the original pins? Yes! Would the aluminum prevent jamming?

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Silent Spoiler!

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With the other problems corrected, the Mark 14 torpedo still didn't work; direct hits tended to be duds. This was because the firing pins of the Mark 14's exploder were designed for a slower torpedo; the impact was so fast that the heavy pin didn't have time to drive into the exploder and set it off before it was crushed under the impact. A more lightweight pin was necessary, and ironically came from the propellers of Japanese planes shot down during the attack on Pearl Harbor. The Mark 14 did not become a reliable weapon until halfway through the war.